anderson



(N0 Model.)

' 2 Sheefis-Sheet 2.

O. W. ANDERSON. ADDING MAGHINE.

Pa t

ented Beo. Z2, 1891.

M N W ATTOI?NEY.

UNITED STATES PATENT OFFICE OI1OF W. ANDERSON, OF MOORHEAD, MINNESOTA, ASSIGNOR OF ONE-IIALF TO AUGUST G. ANDERSON, OB SAME PLAGE.

ADDlNG-MACHINE.

SPECIFICA'IION forming part 0f Letters Patent N0. 465,811, dated December 22, 1891.

Applicatlon file(l May 13, 1891. Serial N0. 392,644. (N0 model.)

T0 all whom it may concern:

Be it known that I, OLOF W. ANDERSON, 21 eitizen of the United States, residing at M001- l1ead, in the county 0f Clay and State 0f Minnesota, have invented certain new and useful Improvements in Adding-Machines; and I d0 hereby deelare the following t0 be a full, clear, ancl exact deseriptionof the invention, such es will ena.ble others skilled in the art to whieh it appertains t0 make and. use the same.

My invention relates to improvements in adding 01' calcula-ting machines.

The object 0f myinvention is t0 provide an exceedingly simple device by means of whieh numbers may l0e rapidly and aeeurately addecl 01 subtraeted in a meehanical manner requiri11g little mental process. These objeets a1e aecomplishecl by and this invention consists in eerta.in novel features 0f construction an(1 in combination 0f parts, more fully described hereinafter, and particularly pointed 011t in the elaims.

In the aecompanying drawings, whieh f0rm 21 part of this speeificationand 011 whieh like referen ce-letters indicate corresponding parts, Figure 1 represents 21 f10nt elevation of my machine as arranged f0r adding, having the buttons removed f10111 the left-hand bar, exposing the numbers 011 sa1x1e. Fig. 2 represents the reverse side a.s arranged f0r sul 1trztcting, havi ng the buttons removed from the leftband bar, exposing the numbers on san1e as in the former ca.se, and Fig. 3 is a cross-section 011 the line x 0c, Figs. 1 and 2.

The letters A, B, C, D, and E indicate 21 series of parallel ba1s 0f wood 01 other mate rial. Each bar is numbered from 0 to 9 011 the two sides, a's shown in Figs. 1 and 2, and is attaehed t0 frame G at both ends.- Upon eaeh 0f these bars nine sliding buttons a.re confinecl. The buttonts 211e 0f such 21 length that nine 0f them Will prefera.bly eover minetenths 0f the bar between the sides of the frame.

The maehine is operated es follows: If y011 wish 130 add, plaee the ma0hine es shown in Fig. l. The bar then at your right would indieate the unit-column, the 11ext one to the left the tens-column,the third 0110 t0 the left the hundreds-colurnn,and so forth. Tl1e m21- ehine, a.s illustrated, shows the result 385.

Should we wish to add three to this 2111101111t, move three buttons 011 the unit-column toward youand the portien 0f the bar then exposecl will show the figure 8. The total result would 5 5 then be 388. T0 this result should we wish to a.dd nine, move 0ne of the buttons 011 the unit-eolumn away from y011, exposing the figure 7, and move 0110 toward you 011 the tenscolumn, exposing the figure 9. T110 total result would then be 397, 2111d so 011. F01 subtraeting I turn the maehine bottom side up,

es illustmted in Fig. 2,z1nd proeeed the same 21s adding. F01 division anal multiplication this maehi ne is equz1lly effective; but I believe it is unnecessary t0 especially point 0ut the manner in which it is used for eaeh purpose 01 t0 cite examples of ealeulation.

It is evident that the machine 02111 be 0011- strueted as an adding and multiplying maehine only, ancl tl1at the buttons 02m be of any shape, made t0 slide in grooves witl1 the pumbers arranged in the bottom 0f same The extreme simplicity and minin1um n1111'1- ber 0f parts employed in this deviee and the many funetions renderit of the grea-test value 2111(1 utility.

VVhat I elai1n as newand desire t0 seeure by Letters Patent, is-

l. The calculating deviee consisting in 21 frame, the series 0f ways representing unit, ten, hundred, &c., eolumns, eaeh way provided with the numerals 0 t0 9, and the 111110 movable buttons f01 eaeh way arranged,substantially as described, 130 eover all of the characters except 0ne 011 each way, f01' the purposes sei; forth.

2. A device f01 the purposes mentioned, 0011- sisting 0f 21 frame provided With the series 0f parallel wa.ys the series 0f numbers 0 130 9 011 0 eaeh wa.y, and the series of movable buttons for each way, arranged to c0ver all but one figure in ea.eh way, as set forth.

3. A frame having the series 0f ways representing columns of units, tens, hundreds, &e., eaeh way being numbered 0 to 9, as set forth, and movable buttons f0r eacl1 way so arranged that any one 0f the numbels 0f each way 02111 be displayed, as and for the purposes sei: forth.

4. The frame provlded with the series of parallel ways, the ways being numbered0 t0 9 oppositely 011 their opposite sides, substantially a s describecl, a11d the movable buttons as to display but a single number of auch so- 10 f0r eaoh way, arrangecl t0 cover all tl1e 11un1- 1'ios 011 a bar. bers but one 011 a side of each way, -'f01 the In bestimonywhereof I alfixiny signature in purposes sei; forth. presence of 13W0 witnesses.

5 5. The fmme provldecl With the series of T 1 T 1 v parallel bars inclicaingeolumns of units, tens, OLOF AI\ DERSO' hundreds, &0., each bar havinp; 13W0 series 0f Witnesses: numbers 0 130 9, arrzmgecl oppositely, anclniue JOHN H. ANDERSON,

movable buttons on each bar, an(l so arranged A. ROSS. 

